S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1936-'84

www.sscycle.com

Features And Benefits • Fits S&S KN-Series engines and stock 1936–'47 knucklehead engines • Accommodates cams with valve lifts up to 480" • Kit consists of inner and outer springs for four valves, spring collars, shims, and valve keepers S&S® 480" Valve Springs Specifications—1936–’47 Big Twin Lift Installed Height Seat Force Force @ Max Lift 480" 1 315" 160 lb 310 lb

1 -2017-UP 2- 2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

480" Valve Springs for 1936–’47 Big Twins Description

Part #

S&S Valve Spring Kit for 1936–'47 OHV bt

106-6398

900-0535

Replacement Parts for 480" Valve Springs Description

Part #

each

106-4362 900-0535 106-3828 90-2037-S 50-7165 106-3827 106-4549 106-5094

Springs, valve, dual, 480"

4 pack

Top collar, valve spring

each

Keepers, valve spring, top collar

8 pack

Bottom collar, valve spring Shim, valve spring 015"

Bottom collar spacer

These springs will not fit over stock guides Stock guides must be turned down or S&S® Vintage guides must be used

Fitment • 1966–’84 big twins

• P-Series engines • SH-Series engines Features And Benefits • 8620 steel heat treated forgings for maximum strength • 750" rocker arm bushing for 50% more load bearing area than stock 500" bushings • Roller tip reduces valve tip wear and side thrusting • 1 5:1 rocker ratio

900-4320A

• Oil passage allows top end oiling through pushrods • Compatible with stock or S&S billet rocker boxes Rocker Arms For Shovelhead Engines Description Set (includes two each front and rear rocker arms) Front exhaust or rear intake (HD-17375-66A) Rear exhaust or front intake (HD-17360-66A)

Part #

900-4320A 900-4320FA 900-4320RA

All reference to HD® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle’s products are original equipment parts or that they are equivalent to the corresponding HD® part number shown.

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